Gas-liquid two-phase flowmeter

Abstract

The utility model discloses a gas-liquid two-phase flow meter, and belongs to the technical field of flow meters. Comprising a first reducing pipe, the two ends of the first reducing pipe are each sleeved with a first flange plate, a first measuring mechanism is arranged at the upper end of the first reducing pipe, a second reducing pipe is arranged at one end of the first reducing pipe, and the two ends of the second reducing pipe are each sleeved with a second flange plate; a second measuring mechanism is arranged between the first reducing pipe and the second reducing pipe and comprises a pipe body, the two ends of the pipe body are connected with one first flange plate and one second flange plate respectively, and the first flange plate and the second flange plate located at the two ends of the pipe body are connected through a plurality of bolts. The first measuring mechanism comprises a first valve, the first valve is arranged at the upper end of a first reducing pipe, and the bottom end of the first valve is connected with a differential pressure transmitter; the gas-liquid two-phase flow measuring device can effectively improve flow measurement of gas-liquid two-phase flow and has high practical value.

Description

Technical Field

[0001] This utility model relates to the field of flow meter technology, specifically a gas-liquid two-phase flow meter. Background Technology

[0002] Accurate measurement of the flow rate of gas-liquid two-phase fluids is crucial in numerous industrial sectors, including petroleum, chemical, and natural gas. Gas-liquid two-phase flows are widely present in production processes, such as oil and gas mixing in oil extraction and gas-liquid mass transfer in chemical reactions. Precise measurement of gas-liquid flow rates can effectively control production processes, improve production efficiency, and ensure safe production.

[0003] Based on the above, the inventors have discovered the following problems: During the extraction and transportation of natural gas, the composition of dry gas is not constant. In different extraction areas and stages, the proportions of components such as methane and ethane in dry gas fluctuate significantly. These changes in composition directly affect the properties of the gas-liquid mixture. Traditional flow measurement principles are unable to accurately capture flow information, leading to increased measurement errors and failing to meet the requirements of high-precision flow measurement in industrial production.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a gas-liquid two-phase flow meter in order to achieve a more practical value. Utility Model Content

[0005] The purpose of this invention is to provide a gas-liquid two-phase flow meter to solve the problems mentioned in the background art.

[0006] By adopting the above technical solutions, it is easy to improve the accuracy of flow meter measurements.

[0007] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0008] A gas-liquid two-phase flow meter includes a first converging tube, with a first flange fitted at both ends of the first converging tube. A first measuring mechanism is provided at the upper end of the first converging tube. A second converging tube is provided at one end of the first converging tube, with a second flange fitted at both ends of the second converging tube. A second measuring mechanism is provided between the first converging tube and the second converging tube. The second measuring mechanism includes a tube body, with both ends of the tube body connected to one of the first flanges and the second flange, respectively. The first flange and the second flange located at both ends of the tube body are connected by a plurality of bolts.

[0009] Furthermore, the first measuring mechanism includes a first valve, which is disposed at the upper end of the first converging tube, and a differential pressure transmitter is connected to the bottom end of the first valve.

[0010] The beneficial effect of adopting the above-mentioned further scheme is that by setting a first valve at the upper end of the first converging tube and connecting it to a differential pressure transmitter, the connection between the differential pressure transmitter and the first converging tube can be opened or closed by controlling the first valve, which facilitates the measurement of the differential pressure of the gas-liquid two-phase flow in the first converging tube using the differential pressure transmitter, and provides data support for flow measurement.

[0011] Furthermore, connecting pipes are installed at both ends of the first valve, and a second valve and a third valve are respectively installed at the bottom end of the connecting pipes.

[0012] The beneficial effect of adopting the above-mentioned further solution is that by installing connecting pipes at both ends of the first valve and installing the second valve and the third valve at the bottom of the connecting pipe respectively, the connection status between the inlet pressure tapping pipe and the throat pressure tapping pipe and the first converging pipe can be controlled independently, which facilitates flexible adjustment of the measurement method and acquisition of pressure data at different positions.

[0013] Furthermore, an inlet pressure tapping pipe is installed at the bottom of the second valve, and the bottom end of the inlet pressure tapping pipe is inserted into one side of the upper end of the first tapering pipe.

[0014] The beneficial effect of adopting the above-mentioned further solution is that by inserting the bottom end of the inlet pressure tapping pipe into one side of the upper end of the first converging pipe and controlling it with the second valve, the pressure of the gas-liquid two-phase flow at the inlet of the first converging pipe can be accurately obtained, providing inlet pressure data for the differential pressure transmitter to measure differential pressure.

[0015] Furthermore, a throat pressure tapping tube is installed at the bottom end of the third valve, and the bottom end of the throat pressure tapping tube is inserted into the other side of the upper end of the first tapering tube.

[0016] The beneficial effect of adopting the above-mentioned further solution is that by inserting the bottom end of the throat pressure tapping tube into the other side of the upper end of the first converging tube and controlling it with the third valve, the pressure of the gas-liquid two-phase flow at the throat of the first converging tube can be obtained. Together with the pressure data obtained by the inlet pressure tapping tube, it can provide complete data for the differential pressure transmitter to measure the differential pressure, thereby measuring the flow rate of the gas-liquid two-phase flow more accurately.

[0017] Furthermore, a vortex flow meter is installed at the upper end of the pipe body, and the bottom end of the vortex flow meter extends through the pipe body into the interior, and a vortex generator is installed thereon.

[0018] The beneficial effect of adopting the above-mentioned further scheme is that a vortex flow meter is installed at the upper end of the pipe body, and the vortex generator at its bottom end extends into the inside of the pipe body. The vortex flow meter is used to measure the flow rate of the gas-liquid two-phase flow in the pipe body by detecting the vortex frequency generated by the vortex generator. In conjunction with the first measuring mechanism, the flow rate of the gas-liquid two-phase flow can be measured more comprehensively and accurately.

[0019] Furthermore, the first tapered tube, the second tapered tube, and the tube body are all made of metal, and the surfaces of the first tapered tube, the second tapered tube, and the tube body are all coated with an anti-rust coating.

[0020] The beneficial effects of adopting the above-mentioned further solution are that the first tapered tube, the second tapered tube, and the tube body are made of metal, which ensures the structural strength and durability of the flow meter, and the anti-rust coating on the surface can effectively prevent the metal material from being corroded and extend the service life of the flow meter.

[0021] The beneficial effects of this utility model are as follows: This utility model provides a gas-liquid two-phase flow meter through the above design. By installing a first valve at the upper end of the first converging tube and connecting it to a differential pressure transmitter, the connection between the differential pressure transmitter and the first converging tube can be opened or closed by controlling the first valve. This facilitates the measurement of the differential pressure of the gas-liquid two-phase flow within the first converging tube using the differential pressure transmitter, providing data support for flow measurement. Connecting pipes are installed at both ends of the first valve, and a second valve and a third valve are installed at the bottom of the connecting pipes respectively. These valves allow for independent control of the connection status between the inlet pressure tap and the throat pressure tap and the first converging tube, facilitating flexible adjustment of the measurement method and acquisition of pressure data from different locations. A vortex flow meter is installed at the upper end of the tube body, with its vortex generator extending into the tube body. The vortex flow meter measures the flow rate of the gas-liquid two-phase flow within the tube body by detecting the vortex frequency generated by the vortex generator. Combined with the first measuring mechanism, this allows for a more comprehensive and accurate measurement of the gas-liquid two-phase flow rate. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the gas-liquid two-phase flow meter disclosed in this embodiment of the utility model. Figure 1 ;

[0023] Figure 2 This is a three-dimensional structural diagram of the gas-liquid two-phase flow meter disclosed in this embodiment of the utility model. Figure 2 ;

[0024] Figure 3 This is a three-dimensional structural diagram of the gas-liquid two-phase flow meter disclosed in this embodiment of the utility model. Figure 3 ;

[0025] Figure 4 This is a front view schematic diagram of the gas-liquid two-phase flow meter disclosed in the embodiment of this utility model.

[0026] In the diagram: 100, first converging tube; 101, first flange; 102, first measuring mechanism; 10201, first valve; 10202, connecting pipe; 10203, second valve; 10204, inlet pressure tap; 10205, differential pressure transmitter; 10206, throat pressure tap; 10207, third valve; 103, second measuring mechanism; 10301, pipe body; 10302, vortex flow meter; 10303, vortex generator; 104, second converging tube; 105, second flange. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a gas-liquid two-phase flow meter, including a first tapered tube 100, with first flanges 101 fitted at both ends of the first tapered tube 100, a first measuring mechanism 102 at the upper end of the first tapered tube 100, a second tapered tube 104 at one end of the first tapered tube 100, with second flanges 105 fitted at both ends of the second tapered tube 104, and a second measuring mechanism 103 between the first tapered tube 100 and the second tapered tube 104. The second measuring mechanism 103 includes a tube body 10301, with both ends of the tube body 10301 connected to one of the first flanges 101 and the second flange 105, respectively. The flange 105 is connected by several bolts between the first flange 101 and the second flange 105 located at both ends of the pipe body 10301. A first tapered tube 100 and a second tapered tube 104 are set up, and a second measuring mechanism 103 is set between them. The flanges at both ends are connected by the pipe body 10301 and fixed by bolts, so that the entire flowmeter structure is connected firmly, which is convenient for installation and disassembly, and facilitates subsequent maintenance and repair. The first measuring mechanism 102 and the second measuring mechanism 103 are used to conveniently measure the medium flowing through the first tapered tube 100, the pipe body 10301 and the second tapered tube 104.

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1 - Figure 4 The first measuring mechanism 102 includes a first valve 10201, which is located at the upper end of the first converging tube 100. A differential pressure transmitter 10205 is connected to the bottom end of the first valve 10201. Connecting pipes 10202 are installed at both ends of the first valve 10201. A second valve 10203 and a third valve 10207 are respectively installed at the bottom ends of the connecting pipes 10202. An inlet pressure tapping pipe 10204 is installed at the bottom end of the second valve 10203. The bottom end of the inlet pressure tapping pipe 10204 is connected to the first converging tube 100. One side of the upper end of the first converging tube 100 is inserted into the first converging tube 100. A throat pressure tap 10206 is installed at the bottom of the third valve 10207. The bottom end of the throat pressure tap 10206 is inserted into the other side of the upper end of the first converging tube 100. By setting a first valve 10201 at the upper end of the first converging tube 100 and connecting it to a differential pressure transmitter 10205, the connection between the differential pressure transmitter 10205 and the first converging tube 100 can be opened or closed by controlling the first valve 10201. This facilitates the measurement of the gas-liquid two-phase flow within the first converging tube 100 using the differential pressure transmitter 10205. Differential pressure provides data support for flow measurement. Connecting pipes 10202 are installed at both ends of the first valve 10201, and second valves 10203 and third valves 10207 are installed at the bottom of the connecting pipes 10202, respectively. These valves allow for independent control of the connection status between the inlet pressure tap 10204 and the throat pressure tap 10206 and the first converging tube 100, facilitating flexible adjustment of the measurement method and acquisition of pressure data at different locations. The connection is achieved by inserting the bottom end of the inlet pressure tap 10204 into one side of the upper end of the first converging tube 100, and controlling the connection via the second valve 10203. The 03 control system can accurately acquire the pressure of the gas-liquid two-phase flow at the inlet of the first converging tube 100, providing inlet pressure data for the differential pressure transmitter 10205 to measure differential pressure. The bottom end of the throat pressure tap 10206 is inserted into the other side of the upper end of the first converging tube 100 and controlled by the third valve 10207, which can acquire the pressure of the gas-liquid two-phase flow at the throat of the first converging tube 100. Together with the pressure data acquired by the inlet pressure tap 10204, it provides complete data for the differential pressure transmitter 10205 to measure differential pressure, thereby more accurately measuring the flow rate of the gas-liquid two-phase flow.

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figure 1 - Figure 4A vortex flow meter 10302 is installed at the upper end of the pipe body 10301. The bottom end of the vortex flow meter 10302 extends through the pipe body 10301 into the interior and is equipped with a vortex generator 10303. The first tapered tube 100, the second tapered tube 104, and the pipe body 10301 are all made of metal, and the surfaces of the first tapered tube 100, the second tapered tube 104, and the pipe body 10301 are all coated with an anti-rust coating. The vortex flow meter 10302 is installed at the upper end of the pipe body 10301, and the vortex generator 10303 at its bottom end extends... Extending into the tube body 10301, the vortex flow meter 10302 measures the flow rate of the gas-liquid two-phase flow inside the tube body 10301 by detecting the vortex frequency generated by the vortex generator 10303. In conjunction with the first measuring mechanism 102, the flow rate of the gas-liquid two-phase flow can be measured more comprehensively and accurately. The first tapered tube 100, the second tapered tube 104 and the tube body 10301 are made of metal, which ensures the structural strength and durability of the flow meter. The anti-rust coating on the surface can effectively prevent the metal material from being corroded and extend the service life of the flow meter.

[0033] Specifically, the working principle of this gas-liquid two-phase flow meter is as follows: In use, in the first measuring mechanism 102, the first valve 10201 is located at the upper end of the first converging tube 100, controlling the connection between the differential pressure transmitter 10205 and the first converging tube 100. The connecting pipes 10202 at both ends of the first valve 10201 are respectively connected to the second valve 10203 and the third valve 10207. The second valve 10203 controls the connection between the inlet pressure tapping pipe 10204 and one side of the upper end of the first converging tube 100 to obtain the gas-liquid two-phase flow pressure at the inlet. The third valve 10207 controls the connection between the throat pressure tapping pipe 10206 and the other side of the upper end of the first converging tube 100 to obtain the gas-liquid two-phase flow pressure at the throat. The differential pressure transmitter 10205 uses the pressure difference obtained from the inlet pressure tapping pipe 10204 and the throat pressure tapping pipe 10206 to provide data support for flow measurement. A vortex flow meter 10302 is installed at the upper end of the tube body 10301 of the measuring mechanism 103. The vortex generator 10303 at the bottom end is located inside the tube body 10301. When the gas-liquid two-phase flow passes through the tube body 10301, the vortex generator 10303 generates vortices. The vortex flow meter 10302 measures the flow rate of the gas-liquid two-phase flow in the tube body 10301 by detecting the vortex frequency. The first measuring mechanism 102 and the second measuring mechanism 103 cooperate with each other to more comprehensively and accurately measure the flow rate of the gas-liquid two-phase flow passing through the first converging tube 100, the tube body 10301 and the second converging tube 104. The first converging tube 100, the second converging tube 104 and the tube body 10301 are made of metal, which ensures the structural strength and durability of the flow meter. The anti-rust coating on the surface prevents the metal material from being corroded, extends the service life of the flow meter and ensures its long-term stable operation.

Claims

1. A gas-liquid two-phase flow meter characterized by, The utility model provides a first tapered pipe (100) both ends of the first tapered pipe (100) are sleeved with first flange plate (101), the upper end of first tapered pipe (100) is equipped with first measuring mechanism (102), one end of first tapered pipe (100) is equipped with second tapered pipe (104), both ends of second tapered pipe (104) are sleeved with second flange plate (105), and second measuring mechanism (103) is equipped between first tapered pipe (100) and second tapered pipe (104), and the second measuring mechanism (103) includes pipe body (10301), both ends of pipe body (10301) are connected with first flange plate (101) and second flange plate (105) respectively, and first flange plate (101) and second flange plate (105) between both ends of pipe body (10301) are connected through a plurality of bolts.

2. A gas-liquid two-phase flow meter according to claim 1, wherein The first measuring mechanism (102) includes a first valve (10201), which is arranged at the upper end of the first tapered pipe (100), and the bottom end of the first valve (10201) is connected with a differential pressure transmitter (10205).

3. A gas-liquid two-phase flow meter according to claim 2, wherein Both ends of the first valve (10201) are mounted with a connecting pipe (10202), and the bottom end of the connecting pipe (10202) is respectively mounted with a second valve (10203) and a third valve (10207).

4. A gas-liquid two-phase flow meter according to claim 3, wherein The bottom end of the second valve (10203) is mounted with an inlet pressure taking pipe (10204), and the bottom end of the inlet pressure taking pipe (10204) is inserted into one side of the upper end of the first tapered pipe (100).

5. A gas-liquid two-phase flow meter according to claim 4, wherein The bottom end of the third valve (10207) is mounted with a throat pressure taking pipe (10206), and the bottom end of the throat pressure taking pipe (10206) is inserted into the other side of the upper end of the first tapered pipe (100).

6. A gas-liquid two-phase flow meter according to claim 1, wherein The upper end of the pipe body (10301) is mounted with a vortex flowmeter (10302), the bottom end of the vortex flowmeter (10302) extends to the inside through the pipe body (10301), and a vortex generator (10303) is mounted.

7. A gas-liquid two-phase flow meter according to claim 1, wherein The first tapered pipe (100), the second tapered pipe (104) and the pipe body (10301) are all made of metal, and the surfaces of the first tapered pipe (100), the second tapered pipe (104) and the pipe body (10301) are coated with a rust-proof coating.

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